SMALL UPS...

Author	Message
Volhout Guru Joined: 05/03/2018 Location: Netherlands Posts: 5910	Posted: 09:27am 30 May 2024         Mixtel90 said   Space, apparently. There isn't any. :) What is the space ? The simplest and smallest UPS I can think of (assuming the Televes UPS will run at 120V DC also) is: 14 rechargable 9V batteries in series, charged from a 1N4007 diode from the mains in series with a relay coil of a 48Vdc relay and a resistor. In case the mains drops off, the relay wil switch the 120V from the batteries to the Televes while disconnecting the mains from it. When the mains returns, the charging restarts and televes is connected (relay back ON) to AC again. Maybe there is a more compact battery for 120Vdc , but the 9V where what I came up with. Volume of this would be roughly 16x 9V battery Run time would be roughly 80mAh x 120V / 15W = 9.6Wh/15W = 40 minutes. Volhout